GLASS IN MANTLE-DERIVED PERIDOTITE XENOLITHS FROM THE McMURDO VOLCANIC GROUP, ANTARCTICA

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概要

• 論文の詳細を見る

• Glass-bearing, mantle-derived peridotite xenoliths have been found in Late Cenozoic basanites at Turtle Rock and McMurdo Station, Ross Island, Antarctica. Glass in these xenoliths occurs as veinlets, interstitial pools, and thin films surrounding the primary xenolith minerals. The glass analyzed has three different compositions. Low-silica high-alkali glasses (42-48wt% SiO_2,4-6wt% Na_2O+K_2O) are likely to represent volatile-rich melts which were incorporated from the host basanite magma. High-silica low alkali glasses (53.5-56wt% SiO_2,4-5wt% Na_2O+K_2O) are non-alkaline and were possibly generated by decompressional breakdown of pargasitic amphibole. High-silica high-alkali glasses (55.5-57 wt% SiO_2,14-15 wt% Na_2O+K_2O) are unique and resemble the chemical composition of the most evolved nepheline-trachyte.

• 国立極地研究所の論文

著者

• Niida Kiyoaki

  Department Of Earth And Planetary Sciences Graduate School Of Science Hokkaido University

• Niida Kiyoaki

  Department Of Geology And Mineralogy Facutly Of Science Hokkaido University

関連論文

• Sr and Nd isotopic data for the seven GSJ rock reference samples : JA-1, JB-1a, JB-2, JB-3, JG-1a, JGb-1, and JR-1
• Glass in mantle-derived peridotite xenoliths from the McMurdo Volcanic Group, Antarctica
• CUMULATE INCLUSIONS FROM TURTLE ROCK, ROSS ISLAND, ANTARCTICA
• PERIDOTITES FROM THE SEAMOUNT OFF WILKES LAND, ANTARCTICA
• METASOMATIC VEINS AND MINERALS IN MANTLE-DERIVED XENOLITHS, ANTARCTICA
• GLASS IN MANTLE-DERIVED PERIDOTITE XENOLITHS FROM THE McMURDO VOLCANIC GROUP, ANTARCTICA

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